Someone

<VirtualHost *:80>
    ServerAdmin it@foo.com
##    DocumentRoot /www/docs/dummy-host2.example.com
    ServerName qa.foo.com
    ErrorLog /var/log/qa.foo.com-error_log
    CustomLog /var/log/qa.foo.com-access_log common

#    CacheEnable mem /
#    MCacheSize 102400
    CacheRoot /tmp/cacheroot
    CacheEnable disk /
    CacheDirLevels 5
    CacheDirLength 3
    CacheIgnoreNoLastMod On

    RewriteEngine On
    RewriteLog "/var/log/qa.foo.com-rewrite_log"
    RewriteLogLevel 2
    RewriteRule ^(.+[^\.]+)$ http://cms.foo.com/$1/index.html [P]
    RewriteRule ^/(.*) http://cms.foo.com/$1 [P]
    ProxyPassReverse / http://cms.foo.com/
</VirtualHost>